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PM5347 Datasheet(PDF) 258 Page - PMC-Sierra, Inc |
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PM5347 Datasheet(HTML) 258 Page - PMC-Sierra, Inc |
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258 / 302 page  PM5347 S/UNI-PLUS DATA SHEET PMC-941033 ISSUE 6 SATURN USER NETWORK INTERFACE PLUS PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 242 Figure 24 - Transport Overhead Data Link Clock and Data Extraction RLDCLK approx. 2 MHz DLCLK bursts RLDCLK RLD B2 B1 B3 B4 B5 B6 B7 B8 B2 B1 B3 B4 B5 B6 B7 B8 B2 B1 B3 B4 B5 B6 B7 B8 RLD RSDCLK B1 RSD B2 B3 B4 B5 B6 B7 B8 B1 B2 B3 B4 B5 B6 B7 B8 B1 B2 B3 B4 B5 B6 B7 B8 125 µs The Transport Overhead Data Link Clock and Data Extraction timing diagram (Figure 24) shows the relationship between the RSD, and RLD serial data outputs, and their associated clocks, RSDCLK and RLDCLK. RSDCLK is a 216 kHz, 50% duty cycle clock that is gapped to produce a 192 kHz nominal rate. RLDCLK is a 2.16 MHz, 67%(high)/33%(low) duty cycle clock that is gapped to produce a 576 kHz nominal rate. RSD (RLD) is updated on the falling RSDCLK (RLDCLK) edge. The D1-D3, and D4-D12 bytes shifted out of the S/UNI-PLUS in the frame shown are extracted from the corresponding receive line overhead channels in the previous frame. |
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